Firmware Security Analysis
Binary extraction and static/dynamic firmware analysis to uncover hardcoded credentials, insecure update mechanisms, and hidden attack surfaces.
Firmware Security Analysis
Embedded firmware is the invisible operating layer of every connected device — routers, industrial controllers, medical equipment, IoT sensors, and consumer electronics. Vulnerabilities buried in firmware — hardcoded credentials, insecure update mechanisms, cryptographic weaknesses, or outdated third-party libraries — are systematically exploited by attackers long before device owners are aware they exist.
Intelliroot's Firmware Security Analysis service provides a systematic, multi-stage examination of device firmware using both automated tooling and manual expert analysis. We extract, unpack, and reverse engineer firmware images to build a complete picture of the embedded attack surface — from known CVEs in bundled software components to custom vulnerabilities in proprietary code.
The Embedded Attack Surface Is Underestimated
Hardcoded Credentials Are Pervasive
Factory-default passwords, backdoor accounts, and hardcoded API keys are present in the majority of analysed firmware images. These credentials persist across firmware updates and provide attackers with reliable access once discovered and published.
Outdated Open-Source Components
Embedded firmware typically bundles Linux kernel versions, BusyBox, OpenSSL, and other open-source software that is years out of date. Each outdated component carries a catalogue of publicly known CVEs that attackers actively exploit with existing tooling.
Insecure Update Mechanisms
Firmware update processes that lack cryptographic signature verification or transmit updates over unencrypted channels allow attackers to deploy malicious firmware to entire device fleets — creating persistent, network-wide backdoors that survive reboots and resets.
Hidden Debug Interfaces and Backdoors
Developer-facing backdoors, test accounts, and debug interfaces are routinely left active in production firmware. Attackers with firmware extraction capability can identify these hidden pathways through static analysis before deploying purpose-built exploitation tools.
What We Analyse
Firmware Extraction
UART shell, JTAG, SPI/I²C flash dumping, OTA update interception, and vendor portal download. We obtain the firmware image by whatever means the device permits.
Static Analysis
Binwalk unpacking, file system analysis, binary string extraction, entropy analysis for encrypted sections, and identification of interesting binaries and configuration files.
Component Inventory (SBOM)
Identification of all bundled software components, libraries, and their versions. Mapping against NVD and vendor advisories to identify known CVEs.
Dynamic Analysis
QEMU-based emulation, GDB dynamic analysis, and function-level fuzzing for network-facing services and update handlers. Runtime behaviour analysis for suspicious network activity.
Our Approach
- 01
Firmware Acquisition
Obtain firmware via physical extraction (UART/JTAG/SPI), OTA update capture, or vendor download. Document provenance and verify image integrity.
- 02
Unpacking & File System Analysis
Use Binwalk, Jefferson, and custom tooling to extract file system contents. Enumerate binaries, configuration files, scripts, and certificates.
- 03
SBOM & CVE Mapping
Identify all third-party software components and their versions. Map against NVD, vendor security bulletins, and exploit databases. Prioritise by exploitability and CVSS score.
- 04
Proprietary Code Analysis
Reverse engineer key binaries using Ghidra/IDA. Identify custom vulnerabilities including buffer overflows, command injection, authentication bypass, and insecure cryptographic implementations.
- 05
Dynamic Testing & Emulation
Emulate firmware in QEMU where possible. Fuzz network-facing services and update handlers. Validate exploitability of statically identified vulnerabilities through dynamic testing.
- 06
Reporting & Remediation Guidance
Deliver a technical report with full vulnerability details, proof-of-concept where applicable, and vendor-ready remediation guidance including patch guidance, SBOM updates, and hardening recommendations.
Deliverables
Firmware Security Report
Full technical report detailing all identified vulnerabilities with severity ratings, proof-of-concept details, and remediation guidance.
Software Bill of Materials (SBOM)
Complete inventory of all identified software components, versions, and associated CVEs — formatted for integration with your vulnerability management process.
Hardcoded Secret Catalogue
Enumeration of all hardcoded credentials, API keys, certificates, and cryptographic material found in the firmware image.
Remediation Roadmap
Prioritised remediation roadmap with specific guidance for each finding, including patch advice, configuration changes, and secure coding recommendations for proprietary code.
Request a Security Assessment
Tell us about your environment and security objectives. We'll design a bespoke assessment and deliver a detailed proposal within 48 hours.